Add real_still candidate clips for verification: only 2 windows in the whole dataset meet the strict still criteria (pose<=10mm/s, cam2<2, tac<3) — telling us the operators are actively manipulating almost the entire time. Manifest in candidates.json.

figures/dataset_figures/freeze_diagnose/real_still/2026-05-11_episode_013_left_9480-9539_clip00_real_still_v1.6_t1.0_sL5_sR5.mp4

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:8ae2ca57422deb60cd792c9687a05ae04a365839f09f0ba4b712d99daf3bc5e9
+size 188714

figures/dataset_figures/freeze_diagnose/real_still/2026-05-11_episode_016_left_10680-10739_clip01_real_still_v1.6_t1.0_sL9_sR5.mp4

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:46158b1c64b2e6910aa0d23300fac595219e46438dba7b9f1c047d36c3ce92b8
+size 134093